Valve for explosion-engines.



A. o. KREBS. y VALVE FORYBXPLOSION ENGINES.

APPLICATION FILED JUNE l5, 1910.

l m 9488 -Patenteaman 5, 1,912.

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TRES ANCIENS ETABLSSEMENTS EANHARD t LEVASS/,- 0F PARS,

VALVE FR. EXLDSN-ENGINES.

Specication of Letters-Patent.

Patente@ implication filed .Tune 15, 1,910; Serial No. 526.9233.

all witom 'it concern:

l@ it known that L An'rnun Cons'nmim 'liningsa :i eitizen oii theRepuhie of Fi'snee,

esielent oi Pnt-is, France? have innew und useful linpiovements in forExpiosion-Engines, which im- -,nts site fully set forth in the 'follow-'nciztion l invention is characterized `by the ooniie ni'iengenient ofsuction-:ind exliiuist of a -eylindei' of an explosion engine. ille said'vulves heine controlled by a ouolenoting ievei ifeoeivii'xp; .itsmovement from a- 'e 1 is 'a veitiez-.l section through the invero ed velifes; 2 is a cross-section l n L ini/ing;u the paris in the position`wle-,ien they zissunie when the suction valve is open; Fig'. 2a is adetail View showing the 'pests in the ioosition which they assume whenthe suction valve is olosed. Fig. 3 shows a 'detail of s modification.

fin (l is the oylinclei" with its Water VLC 1 foi? cooling its "Valls,The openingr upper end oi"A 'the 4oylincler 1s closed hreeeli paint 2heldin place 'oy' .means ine;q het nrisngeol in the usuel manner. The

v said. breech part is provided along its axis with s cylindricalorifice-in eommunieation with two superposed annular 'eeesses thebottoni iecess 3 being for exhaust, and the upper i'eoess 4 `forsuction. ,These two re- Gosses communicate with the'exteiiorrespectively by ineens of exhaust orifice. 5 and suotion orifice Throughthe central opening of the breech part passes a valve 7 sliding with arslight amount of friction in the oriiee in Question, the widened edgesof the Suid vslve resting@` aga-inst the ground bottom .e of the hieeehvwhioh constitutes tappen end of 'the cylinder 0.

The valve 7 is hollow throughout its length mul provided with stliapi'xstgm S located shove the ennuis? suction cheniher 4. @pennies 9povifled in the Wall of lthe valve, below the diaphragm 8, establishCommunication with the suction opening". The upper end of the valve Tkis closed by a. cap 10, against the outer edges oi which rests a.spring l1 restingon the othei* henri on the breecln Untie the action of'the tension oit' the spring in question, the widened edges. of thevulve are held in Contact., vVith a certain sinount of pressure, withthe ground surface Vofthe breech. 2 and thus mevent any communicationbetween the Cylinder und the exhaust Conduit. The valve 'i7 is called.the exhaust valve. 'ifhiough this exhaust valve itself passes,slongits-exis the spindle .l2 ofthe suction veive. To that end, thediaphragm 8 is provided with s. hole pirovided with asleeve 13 forming'e. ,fluide 'for the spindle oi' the suction Valve. The widened `portionof the said vsve closes the eentrl orifice of the exhaust valve et theside of the cylinder, by resting" against the ground surface of thebreech ns shown at 11iin. Fig. 1.

The snc-tion' valve is held against its seat hy a spring' 16 nesting 'onthe diaphragm of.

the exhaust valve and .pressing against a, cross-hei" 17 of 'the spindleof 'the vsuction valve. The control oi the ssiflyalves is efeeteflhymeans of 'the balance beam 18 mounted on e bracket 19 by means of s.spindle or' pin 2G about which it can. oseillate. rEheenl of the balonesbeam at the side of the vulves is bifnreated and passes above the cap l0of the exhaust valve bove the enfle 21 .of the seid forli' oit theholsnee beam (Fig: 2i are srianfijol two small balance heinns 22 22 theplane of os-.

eillstion of which .is :it s night angle to 'that of the balance' benini8. The pivot pins 23 ofthe said small balance beams 22 are seemed tothe cap l() of the exhaust valve and the beams 22 have one endcontacting with the upper surfaces of the ends 21 of the fork of thebeam 18 and their other encls with the top of theV spindle of the suc'tion valve l2. Finally, the end of the losl-v u-nce beam 1S opposite thevalves, is pivoted at' 24e (Fig. l) to a rofl 25 resting on a. com 26 bymeans of :t roller 27. A spring 2S resting :it 2 9 on the frame oi themotor, keeps the1-oller 27 always in Contact with fsa the cam. l'n orderto obtain that result the spring 28 combined with the leverage of thebalance' beam 18, must produce a greater momentum than that produced atthe other 4 side of the same balance beam by the spring 16 of thesuction valve and the small balance beams 22 22.

For describing the working of the device,

it will be assumed that the piston of the the small balancebeams 22, 22on their' supports 23, 23 secured to the said valve. .At the end of thesuctlon period, the cani 'brings the balance beam 18 back to its horizontal or central position corresponding to the closing of thetwolvalves. The two periods of compression and of combustion followed byexpansion succeed eachother afterward, without any modification in theclosed position of the valves. At the end of the expansion period, thecam, by raising the .rod 25, oscillates the balance beam 18 which, byressing on the cap of the exhaust valve, orces the latter to open theopening of the exhaust 'conduit through which Vthe combustion gases canescape. The exhaust valve carries in its movement the suction valvewhich keeps the communication with the suction conduit cut ofi". At theend of the exhaustthe cam causes the rod 25 tov rise, to oscillate thebalance beam 18 and to close the exhaust opening, before uncovering thesuction opening, as already stated. .The opening and closing movementsof the suction and exhaust ,valves take, therefore, place in the usualworking conditions of a four-stroke explosion engine.

The arrangement shown in the drawings for working the valves by means ofa single cam and a single rod, is given merely by way of example, foritis obvious that any other constructions fulfilling the sameconditionscould be used, for instance the construction shown in Fig. 3. In thismodified construction, the two small balance beams 22 22 are replaced bya single small balance beam 30 arranged in the same plane of oscillationas the balance beam 18. On the one hand, it rests with one of its endson the spindle of the suction valve, and on the other hand, on asuitable boss provided on the balance beam 18. 'I he length of the leverarms or leverages are calculated so as to obtain the necessary travel.

Claim.

In an explosive engine, the combination with concentrically disposedintake andt exhaust valves having slidably associated stems, of a leveroperating on one of the stems to move its valve to open position, andanotherlever mounted on said stem and e11- gaging the first mentionedlever and the stem of the other valve to transmit motion.

ARTHUR C ONSTANTlN KRERS.

Witnesses:

EMILE LEDRET, H. C. Coxn.

